| Tartalmi leírás: |
Yb:YAG thin-disk lasers offer extraordinary output power, but
systems delivering femtosecond pulses at a repetition
rate of hundreds of kilohertz are scarce, even though this
regime is ideal for ultrafast electron diffraction,
coincidence
imaging, attosecond science, and terahertz (THz)
spectroscopy. Here we describe a regenerative Yb:YAG
amplifier based on thin-disk technology, producing 800-fs
pulses at a repetition rate adjustable between 50 and
400 kHz. The key design elements are a short regenerative
cavity and fast-switching Pockels cell. The average output
power is 130Wbefore the compressor and 100Wafter compression,
which at 300 kHz corresponds to pulse energies
of 430 and 330 μJ, respectively. This is sufficient for a
wide range of nonlinear conversions and broadening/
compression schemes. As a first application, we use optical
rectification in LiNbO3 to produce 30-nJ single-cycle
THz pulses with 6Wpump power. The electric field exceeds 10
kV∕cm at a central frequency of 0.3 THz, suitable for
driving structural dynamics or controlling electron beams.
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| Azonosító: |
Schneider, W. and Ryabov, A. and Lombosi, Cs. and Metzger, T. and Major, Zs. and Fülöp József, András (2014) 800-fs, 330-µJ pulses from a 100-W regenerative Yb:YAG thin-disk amplifier at 300 kHz, and THz generation in LiNbO3. OPTICS LETTERS, 39. pp. 6604-6607. ISSN 0146-9592
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